{
  "manageEntity": {
    "action": "Save",
    "entityId": "2016670495",
    "entityType": "Track",
    "nonce": "0xffa8cf3443d69fa3bda13cd480257a26591067e273bbb81d84370687221f2646",
    "signature": "0xc16bb0890442295046a81323a3b061ac88915c94b8bc79a8423c73577cbde51a61109305486c869f1c6b8a41cced3f9e49db20d645ab1e2ce0ec2691cd3e562d1c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}